JP2013243556A - Ring network changing method, ring network, and ring node - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ring network changing method, a ring network, and a ring node, which are capable of changing a ring shape without generating communication disconnection in such a relay network configured using a ring protocol.SOLUTION: The ring network is configured so that, in the relay network constructed of a plurality of ring nodes and a communication path connecting between the ring nodes, a logical ring is formed with the ring nodes and the communication path, and a ring protocol for setting a logical communication path allowing the logical ring to perform communication is applied. The ring network includes a control device that, while sharing the path to avoid the communication disconnection before and after changing when the logical ring is changed, changes the logical ring in a state of maintaining the logical communication path on the path and sets the all logical communication path to the changed logical ring.

Description

  The present invention relates to a ring network changing method for adding a ring or changing the shape of a ring without stopping communication after network construction, a ring network that enables the change, and a ring node provided in the ring network.

  Currently, a relay network used for a wide area Ethernet (registered trademark) service or the like can be economically constructed while securing a redundant path by using a ring protocol (for example, Non-Patent Document 1). See). In a relay network using the ring protocol, it is possible to construct a redundant path with node failure tolerance throughout the relay network by connecting each ring redundantly, and when any node in the relay network fails In addition, the path is switched to ensure the normality of communication. At this time, when the amount of traffic flowing on the network increases due to an increase in subscribers or addition of services, or when the communication path is changed by changing a redundant path or laying a new transmission path, the ring protocol is generally used. In the implemented transfer device, it is necessary to delete the ring setting once and add the ring setting with a new communication path. However, communication will be stopped from the deletion to the addition of the setting. Will have a negative impact.

  In the present specification, the “ring setting” is referred to as “logical communication path”, and the “communication path” is referred to as “logical ring”. For example, the logical communication path corresponds to a VLAN in Ethernet (registered trademark), and the logical ring corresponds to a ring instance in the ring protocol.

  FIG. 1 is an example of a conventional network configuration. The ring nodes 101 to 106 constitute a ring network, the ring node 101 and the ring node 102 are connected via the ring ports 1012 and 1021 and the communication path 21, and the ring node 102 and the ring node 103 are connected to the ring port 1022. 1031 and the communication path 21, the ring node 103 and the ring node 104 are connected via the ring ports 1032 and 1041 and the communication path 21, and the ring node 104 and the ring node 105 are connected to the ring ports 1042 and 1051. And the ring node 105 and the ring node 106 are connected via the ring ports 1052 and 1061 and the communication path 21. The ring node 106 and the ring node 101 are connected to the ring ports 1062 and 1011 and the communication. Road 1 is a connection Configurations through. At this time, as shown in FIG. 2, the logical ring 1 is set to the ring nodes 101 to 106 and the ring ports 1011 to 1062, and the logical communication path 11-1 is set to be controlled by the logical ring 1. ing. At this time, in a situation where the amount of communication distributed on the logical ring 1 exceeds the amount of communication that can be transmitted / received via each ring port 1011 to 1062 or the communication path 21, the number of ports is increased at all ring nodes on the ring. The amount of communication that can be transmitted and received on the network can be increased by a method of reducing the amount of communication distributed on each communication path and each port by dividing the ring. As an example, a method for dividing a ring is shown in FIGS.

  FIG. 3 shows an example of a conventional network configuration in which a ring is divided. 1, the ring port 1113 is added to the ring node 101, the ring port 1143 is added to the ring node 104, and the ring ports 1113 and 1143 are connected using the communication path 22. At this time, the logical ring 2 is newly set in the ring nodes 101, 104, 105, and 106 and the ring ports 1011, 1113, 1143, 1051, 1052, 1061, and 1062. Thereafter, by deleting the logical communication path 11-1 from the logical ring 1 and setting the logical communication path 11-2 to the logical ring 2, communication is performed in the new logical ring 2 without passing through the ring nodes 102 and 103. It becomes possible. Accordingly, since a new communication capacity can be secured in the ring nodes 102 and 103, the communication capacity can be expanded as a whole network.

Recommendation ITU-T G. 8032 / Y. 1344, “Ethernet (R) Ring Protection Switching (03/2010)”

  However, since there is a time during which no logical communication path exists between “deleting the logical communication path 11-1 from the logical ring 1” and “setting the logical communication path 11-2 to the logical ring 2”, As a result, it becomes difficult to provide services continuously.

  Therefore, in order to solve the above-described problem, the present invention provides a ring network changing method, a ring network, and a ring network that can change a ring shape without causing communication interruption in a relay network configured using a ring protocol, and The object is to provide a ring node.

  In order to achieve the above object, according to the present invention, the logical communication path and the logical ring on the path on which communication interruption is to be avoided are not changed, and the logical communication path and the logical ring are changed on the other paths.

Specifically, the ring network changing method according to the present invention forms a logical ring between the ring node and the communication path in a relay network constructed by a plurality of ring nodes and a communication path connecting the ring nodes. , A ring network changing method to which a ring protocol for setting a logical communication path enabling communication in the logical ring is applied,
When changing the logical ring, the path that should avoid communication interruption before and after the change is made common, and the logical ring is changed while maintaining the logical communication path on the path,
All the logical communication paths are set in the changed logical ring.

Specifically, the ring network according to the present invention forms a logical ring between the ring node and the communication path in a relay network constructed by a plurality of ring nodes and a communication path connecting the ring nodes, A ring network to which a ring protocol for setting a logical communication path enabling communication with a logical ring is applied,
When changing the logical ring, the path that should avoid communication interruption before and after the change is made common, and the logical ring is changed while maintaining the logical communication path on the path,
A control device that sets all the logical communication paths in the logical ring after the change is provided.

Specifically, a ring node according to the present invention is a ring node that forms a logical ring in a relay network and constructs a ring network to which a ring protocol that sets a logical communication path that enables communication with the logical ring is applied. There,
When changing the logical ring, the path to avoid communication interruption before and after the change is made common, and the logical ring is changed in a state where the logical communication path on the path is maintained,
It has a logical ring change function for setting all the logical communication paths in the logical ring after the change.

  Since the logical communication path on the path on which communication disconnection is to be avoided is not disconnected, it is possible to change the traffic capacity by changing the shape of the logical ring while continuously communicating. Therefore, the present invention provides a ring network changing method, a ring network, and a ring node that can change a ring shape without causing communication interruption in a relay network configured using a ring protocol. it can.

The logical ring changing function of the ring node according to the present invention is:
A plurality of ring ports for configuring the ring network;
A logical ring setting management unit that forms a plurality of the logical rings on the ring port;
A logical channel setting manager configured to set a plurality of the logical channels on the ring port;
A ring-communication path correspondence setting unit that associates the logical ring with the logical communication path, and conducts and stops communication via the logical communication path on the ring port according to a control state of the logical ring;
A ring-communication path correspondence setting changing unit that changes association between the logical ring and the logical communication path.

The logical ring changing function of the ring node according to the present invention is:
A plurality of ring ports for configuring the ring network;
A logical ring setting management unit that forms a plurality of the logical rings on the ring port;
A logical channel setting manager configured to set a plurality of the logical channels on the logical ring;
A ring port-logical ring correspondence setting changing unit that changes the ring port in which the logical ring is set to another ring port;
Can be included.

  By providing a function for changing the correspondence between the logical ring and the communication path (port) in the ring node, it is possible to change the logical ring while maintaining the logical communication path on the path on which communication disconnection is to be avoided.

  INDUSTRIAL APPLICABILITY The present invention can provide a ring network changing method, a ring network, and a ring node that can change a ring shape without causing communication interruption in a relay network configured using a ring protocol. .

It is a figure explaining the conventional ring network. It is a figure explaining the conventional ring network. It is a figure explaining change of a ring shape. It is a figure explaining change of a ring shape. It is a figure explaining the ring node which concerns on this invention. It is a figure explaining the ring node which concerns on this invention. It is a figure explaining the ring network which concerns on this invention. It is a figure explaining change of a ring shape. It is a figure explaining change of a ring shape. It is a figure explaining change of a ring shape. It is a figure explaining change of a ring shape. It is a figure explaining change of a ring shape. It is a figure explaining change of a ring shape. It is a figure explaining change of a ring shape. It is a figure explaining change of a ring shape.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below are examples of the present invention, and the present invention is not limited to the following embodiments. In the present specification and drawings, the same reference numerals denote the same components.

(Ring node embodiment)
5 and 6 are diagrams illustrating the ring nodes (301, 401) of the present embodiment. The ring nodes (301, 401) are ring nodes that form a ring network using a ring protocol that forms a logical ring in a relay network and sets a logical communication path that enables communication in the logical ring. When changing a logical ring, a path that should avoid communication interruption before and after the change is made common, and the logical ring is changed in a state where the logical communication path on the path is maintained. And a logical ring changing function for setting the logical communication path.

(Ring node first form)
The ring node 301 in FIG. 5 has a plurality of ring ports (302-1 to 302-n) for configuring the ring network and a plurality of the logical rings on the ring port for the logical ring changing function. A logical ring setting management unit 303 to be formed, a logical communication path setting management unit (port) 304 for setting a plurality of logical communication paths on the ring port, and associating the logical ring with the logical communication path, Depending on the control state of the logical ring, the ring-communication path correspondence setting unit 305 that conducts and stops communication via the logical communication path on the ring port, and the association between the logical ring and the logical communication path are changed. A ring-communication channel correspondence setting changing unit 306.

  The logical ring setting management unit 303 sets a logical ring for one or two of the plurality of ring ports 302 and performs switching and recovery operations according to the state of the logical ring. Controls the continuity or stop state of communication that is conducted. Here, the “ring state” refers to a logical blockage (= blocking) state according to the ring protocol.

  At this time, the logical ring setting management unit 303 configures a logical ring for the ring ports 302-1 and 302-2, configures a logical ring for the 302-1 and 302-3, for example, A plurality of logical rings in which ring ports are freely combined can be configured such that a logical ring is configured for 302-3 and a logical ring is configured for 302-n.

  The logical communication path setting management unit (port) 304 sets one or a plurality of logical communication paths for one or more of the plurality of ring ports 302 and is given an identifier or the like for identifying the logical communication path. Control to enable communication.

  The ring-communication path correspondence setting unit 305 enables the communication on the logical communication path to be turned on or off according to the state of the logical ring in the ring port 302 in which the logical ring and the logical communication path are set. The logical ring is associated with the logical communication path. For example, when the logical ring set for the ring ports 302-1 and 302-2 is associated with the logical communication path set for the ring ports 302-1 and 302-2, the logical ring is set according to the state of the logical ring. Thus, communication on the logical communication path can be conducted or stopped. In other words, blocking in the initial state of the ring, blocking automatically set when ring switching occurs due to failure occurrence, blocking established when manual switching by the operator is performed, etc. Communication can be stopped, and when no other blocking is installed, communication on the logical communication path can be conducted.

  At this time, the logical communication path may be set to other than the ring ports 302-1 and 302-2, and in this case, it corresponds to another logical ring set to the ring ports 302-3 to 302-n. As a result, communication can be conducted or stopped in cooperation with the state of the logical ring. In addition, the logical communication path is not necessarily associated with the logical ring. For example, a logical communication path is set in the ring port 302-1 and the logical communication path is set to all the logical rings set in the ring port 302-1. If not associated, communication can be conducted regardless of the state of the ring.

  The ring-communication path correspondence setting changing unit 306 changes the association between the logical ring and the logical communication path set by the ring-communication path correspondence setting unit 305 in the ring port 302 in which the logical ring and the logical communication path are set. To do.

  As a result, the correspondence between the logical ring and the logical communication path can be arbitrarily changed, so that the logical communication path can be moved between logical rings having different shapes configured on the ring network. Expansion and division are possible.

(Ring node second form)
The ring node 401 of FIG. 6 has a plurality of ring ports (402-1 to 402-n) for configuring the ring network and a plurality of logical rings on the ring port for the logical ring change function. A logical ring setting management unit 403 to be formed, a logical communication path setting management unit (ring) 404 that sets a plurality of logical communication paths on the logical ring, and the ring port in which the logical ring is set to the other A ring port-logical ring correspondence setting changing unit 405 for changing to a ring port.

  The logical ring setting management unit 403 sets a logical ring for one or two of the plurality of ring ports 402, and performs switching and recovery operations according to the state of the logical ring. Controls the continuity or stop state of communication that is conducted. At this time, for example, the logical ring setting management unit 403 configures a logical ring for the ring ports 402-1 and 402-2, configures a logical ring for the 402-1 and 402-3, As described above, a logical ring is configured for 402-3 and a logical ring is configured for 402-n, and a plurality of logical rings in which ring ports are freely combined can be configured.

  The logical communication path setting management unit (ring) 404 associates a logical communication path with the logical ring set by the logical ring setting management unit 403. At this time, by making the logical communication path correspond to the logical ring, it is possible to perform communication with an identifier or the like for identifying the logical communication path at the ring port in which the logical ring is set, and the communication is The conduction or stop state is controlled according to the state of the logic ring.

  The ring port-logical ring correspondence setting changing unit 406 changes a ring port in which a logical ring is set.

  As a result, the correspondence between the logical ring and the ring port in which the logical ring is set can be arbitrarily changed, so the shape of the logical ring can be changed on the ring network, and the ring can be added or divided freely. It becomes possible.

(Ring network embodiment)
FIG. 7 is a diagram for explaining the ring network of the present embodiment. The ring network of this embodiment forms a logical ring between the ring node and the communication path in a relay network constructed by a plurality of ring nodes and a communication path connecting the ring nodes, and communicates with the logical ring. A ring network to which a ring protocol for setting a logical communication path to be enabled is applied, wherein when the logical ring is changed, a common path to avoid communication interruption before and after the change is used, and the logical communication on the path A control device is provided that changes the logical ring while maintaining a path, and sets all the logical communication paths in the changed logical ring. 7 to 15 do not show the control device.

  The logical ring change is executed when the network operator determines an appropriate timing and inputs a change command to the control device. For example, when the traffic increases from the initial design, the appropriate timing is the expansion of the network construction area (for example, at the service start stage, the area to be provided is an urban area, and a ring connecting the urban areas is constructed. There are cases where the area is sequentially expanded and the ring connecting the urban areas is divided into a plurality of small rings, and the shape is changed by changing the transmission path such as the optical fiber installation path. The control unit to which the change instruction is input has a common path to avoid communication interruption before and after the change for each ring node, and changes the logical ring while maintaining the logical communication path on the path. Instructing the logical ring after the change to set all the logical communication paths.

  The ring network shown in FIG. 7 includes a ring node 501 having ring ports 5011, 5012, and 5113, a ring node 502 having ring ports 5021, 5022, and 5123, a ring node 503 having ring ports 5031 and 5032, and a ring port. Ring node 504 having 5041, 5042, 5143, ring node 505 having ring ports 5051, 5052, 5153, ring node 506 having ring ports 5061, 5062, a plurality of communication paths 21, and a bypass communication path 22 and 23.

  At this time, the ring node 501 and the ring node 502 are connected via the ring ports 5012 and 5021 and the communication path 21. The ring node 502 and the ring node 503 are connected via ring ports 5022 and 5031 and the communication path 21. The ring node 503 and the ring node 504 are connected via ring ports 5032 and 5041 and the communication path 21. The ring node 504 and the ring node 505 are connected via ring ports 5042 and 5051 and the communication path 21. The ring node 505 and the ring node 506 are connected via ring ports 5052 and 5061 and the communication path 21. The ring node 506 and the ring node 501 are connected via ring ports 5062 and 5011 and the communication path 21. Also, as a detour communication path, the ring node 501 and the ring node 504 are connected via ring ports 5113 and 5143 and the communication path 22. The ring node 502 and the ring node 505 are connected via ring ports 5123 and 5153 and the communication path 23. At this time, the ring nodes 501 to 506 have the functions of the ring nodes 301 and 401 or both shown in FIG.

(Ring network change example 1)
8 and 9 are diagrams showing a first embodiment of the ring network change. In the initial state, it is assumed that the logical ring and the logical communication path are set as shown in FIG. That is, for the ring nodes 501 to 506 in FIG. 7, the logical ring 61 is configured so as to pass through all the ring nodes, and the logical communication path 67-1 is set on the logical ring 61.

  For example, when the ring nodes 501 to 506 have the function of the ring node 301 shown in FIG. 5, the logical ring 61 is configured on the ring ports 5011 to 5062 by the logical ring setting management unit 303, and the logical communication path setting management unit (port ) 304, the logical communication path 67-1 is configured on the ring ports 5011 to 5062, and the logical communication path 67-1 is associated with the logical ring 61 by the ring-communication path correspondence setting unit 305. It is possible to set so as to control the conduction or stop state of the logical communication path 67-1 in each ring port according to the state.

  When the ring nodes 501 to 506 have the function of the ring node 401 shown in FIG. 6, the logical ring 61 is configured on the ring ports 5011 to 5062 by the logical ring setting management unit 403, and the logical communication path setting management unit (ring ) 404, by configuring the logical communication path 67-1 on the logical ring 61, it is possible to set so as to control the conduction or stop state of the logical communication path 67-1 in each ring port according to the state of the logical ring 61. it can.

  Next, consider changing the logical ring and logical communication path as shown in FIG. 8 to the logical ring and logical communication path as shown in FIG. 9 due to an increase in traffic on the network.

  First, the logical ring 62 is configured as shown in FIG. 9 so as to pass through the ring nodes 501, 504, 505, and 506 in FIG. Thereafter, by changing the logical communication path 67-1 in FIG. 8 to become the logical communication path 67-2 in FIG. 9, the logical ring can be changed without having to stop the traffic flowing on the logical communication path. Can do.

  Specifically, when the ring nodes 501 and 504 to 506 have the function of the ring node 301 shown in FIG. 5, the ring ports 501 and 504 to 506 have the ring ports 5011 and 5113. 5143, 5042, 5051, 5052, 5061, 5062 constitute a logical ring 62, and the ring port in which the logical communication path 67-1 is set by the logical communication path setting management unit (port) 304 in the ring node 501 Are changed from 5011 and 5012 to 5012 and 5113, and in the ring node 504, the ring ports to which the logical communication path 67-1 is set by the logical communication path setting management unit (port) 304 are changed from 5041 and 5042 to 5041 and 5143. To ring nodes 501, 504 to 506 Then, the ring-communication path correspondence setting changing unit 306 changes the corresponding logical ring of the logical communication path 67-1 from 61 to 62, and finally sets it to the shape of 67-2 in FIG. By doing so, the correspondence between the logical ring and the logical communication path can be changed without communication interruption.

  When the ring nodes 501 and 504 in FIG. 7 have the function of the ring node 401 shown in FIG. 6, the ring port-logical ring correspondence setting change unit 405 changes the corresponding ring port of the logical ring 61 to the ring node 501. By changing from 5011 and 5012 to 5011 and 5113 in the ring node 504, and from 5041 and 5042 to 5041 and 5143 in the ring node 504, and setting to the shape of the logical ring 62, the logical ring and the ring can be connected without interruption. The correspondence between ports can also be changed.

  As a result, it is possible to change the shape of the logical ring without communication interruption and increase the amount of communication that can be transmitted and received on the ring network.

(Ring network change example 2)
10 and 11 are diagrams showing a second embodiment of the ring network change. In the initial state, it is assumed that the logical ring and the logical communication path are set as shown in FIG. That is, for the ring nodes 501 to 506 in FIG. 7, the logical ring 71 is configured to pass through all the ring nodes, and logical communication paths 77-1 and 78-1 are set on the logical ring 71.

  For example, when the ring nodes 501 to 506 have the function of the ring node 301 shown in FIG. 5, the logical ring 71 is configured on the ring ports 5011 to 5062 by the logical ring setting management unit 303, and the logical channel setting management unit (port ) 304, logical communication paths 77-1 and 78-1 are configured on the ring ports 5011 to 5062, and the logical communication paths 77-1 and 78-1 are connected to the logical ring 61 by the ring-communication path correspondence setting unit 305. By associating with each other, the state of the logical ring 61 can be set so as to control the conduction or stop state of the logical communication paths 77-1 and 78-1 in each ring port.

  When the ring nodes 501 to 506 have the function of the ring node 401 shown in FIG. 6, the logical ring 71 is configured on the ring ports 5011 to 5062 by the logical ring setting management unit 403, and the logical communication path setting management unit (ring ) 404, the logical communication paths 77-1 and 78-1 are configured on the logical ring 71, so that the logical communication paths 77-1 and 78-1 in each ring port are turned on or off depending on the state of the logical ring 71. Can be set to control.

  Next, consider changing the logical ring and logical communication path as shown in FIG. 10 to the logical ring and logical communication path as shown in FIG. 11 by increasing traffic on the network.

  At this time, the method of changing the route of the logical communication path 77-1 to 77-2 can be performed by the same method as that of the first embodiment of the ring network change, and will be omitted. Next, the logical ring 73 is configured to pass through the ring nodes 502, 503, 504, and 505 in FIG. Thereafter, by changing the logical communication path 78-1 in FIG. 10 to become the logical communication path 78-2 in FIG. 11, the logical ring is changed without having to stop the traffic flowing on the logical communication path. Can do.

  Specifically, for example, when the ring nodes 502 to 505 have the function of the ring node 301 illustrated in FIG. 5, the ring ports 5123, 5022, 5031, and the ring nodes 502 to 505 are processed by the logical ring setting management unit 303. A logical ring 73 is configured on 5032, 5041, 5042, 5051, and 5153. In the ring node 502, a ring port in which the logical communication path 78-1 is set by the logical communication path setting management unit (port) 304 is set to 5021. 5022 to 5022 and 5123, and in the ring node 505, the logical communication path setting management unit (port) 304 changes the ring port in which the logical communication path 78-1 is set from 5051 and 5052 to 5051 and 5153. In the ring nodes 502 to 505, -By changing the corresponding logical ring of the logical communication path 78-1 from 73 to 84 by the communication path corresponding setting changing unit 306, and finally setting it to have the shape of 78-2 in FIG. The correspondence between logical rings and logical channels can be changed without communication interruption.

  As a result, it is possible to change the shape of the logical ring without communication interruption and increase the amount of communication that can be transmitted and received on the ring network.

(Ring network change example 3)
12 and 13 are diagrams showing a third embodiment of the ring network change. In the initial state, it is assumed that the logical ring and the logical communication path are set as shown in FIG. That is, for the ring nodes 501 to 506 in FIG. 7, logical rings 81 and 82 are configured to pass through all the ring nodes, and a logical communication path 87-1 is set on the logical ring 81. Is set with a logical communication path 88-1.

  For example, when the ring nodes 501 to 506 have the function of the ring node 301 shown in FIG. 5, the logical rings 81 and 82 are configured on the ring ports 5011 to 5062 by the logical ring setting management unit 303, and the logical communication path setting management unit (Port) 304 configures logical communication paths 87-1 and 88-1 on ring ports 5011 to 5062, and associates logical communication path 87-1 with logical ring 81 by ring-communication path correspondence setting unit 305. By associating the logical communication path 88-1 with the logical ring 82, the state of the logical ring 81 can be set so as to control the conduction or stop state of the logical communication path 87-1 in each ring port. 82 controls the conduction or stop state of the logical communication path 88-1 in each ring port. It is possible to set up.

  When the ring nodes 501 to 506 have the function of the ring node 401 shown in FIG. 6, the logical rings 81 and 82 are configured on the ring ports 5011 to 5062 by the logical ring setting management unit 403, and the logical communication path setting management unit (Ring) 404 configures the logical communication path 87-1 on the logical ring 81 and sets the logical communication path 88-1 to the logical ring 82, whereby the logical communication path 87-in each ring port depends on the state of the logical ring 81. 1 can be set to control the conduction or stop state of one, and the state of the logical ring 82 can be set to control the conduction or stop state of the logical communication path 88-1 in each ring port.

  Next, consider changing the logical ring and logical communication path as shown in FIG. 12 to the logical ring and logical communication path as shown in FIG. 13 due to an increase in traffic on the network.

  At this time, the method of changing the route of the logical communication path 87-1 to 87-2 can be performed by the same method as that of the first embodiment of the ring network change, and therefore will be omitted. Next, the configuration of the ring nodes 502 to 505 in FIG. 7 is changed so that the logical ring 82 in FIG. 12 becomes the logical ring 84 in FIG. 13, so that the logical communication path 88-1 in FIG. As a result, the logical ring can be changed without having to stop the traffic flowing on the logical communication path.

  Specifically, for example, when the ring nodes 502 and 505 in FIG. 7 have the function of the ring node 401 shown in FIG. 6, the ring port-logical ring correspondence setting changing unit 405 causes the corresponding ring port of the logical ring 82 to correspond. Is changed from 5021 and 5022 to 5123 and 5022 in the ring node 502, and from 5051 and 5052 to 5051 and 5153 in the ring node 505, and is set to have the shape of the logical ring 84. The correspondence between the logical ring and the ring port can be changed. Note that changing the route of the logical communication path 88-1 to 88-2 can also be performed by the same method as in the second embodiment.

  As a result, it is possible to change the shape of the logical ring without communication interruption and increase the amount of communication that can be transmitted and received on the ring network.

(Ring network change example 4)
14 and 15 are diagrams showing a fourth embodiment of the ring network change. In the initial state, it is assumed that the logical ring and the logical communication path are set as shown in FIG. That is, for the ring nodes 501 to 506 in FIG. 7, the logical ring 91 is configured to pass through all the ring nodes, and the logical communication path 97-1 is set on the logical ring 91.

  For example, when the ring nodes 501 to 506 have the function of the ring node 301 shown in FIG. 5, the logical ring 91 is configured on the ring ports 5011 to 5062 by the logical ring setting management unit 303, and the logical communication path setting management unit (port ) 304, the logical communication path 97-1 is configured on the ring ports 5011 to 5062, and the logical communication path 97-1 is associated with the logical ring 91 by the ring-communication path correspondence setting unit 305. It can be set to control the conduction or stop state of the logical communication path 97-1 in each ring port depending on the state.

  When the ring nodes 501 to 506 have the function of the ring node 401 shown in FIG. 6, the logical ring 91 is configured on the ring ports 5011 to 5062 by the logical ring setting management unit 403, and the logical communication path setting management unit (ring ) 404, the logical communication path 97-1 is configured on the logical ring 91, so that the state of the logical ring 91 can be set to control the conduction or stop state of the logical communication path 97-1 in each ring port. it can.

  Next, consider changing the logical ring and logical communication path as shown in FIG. 14 to the logical ring and logical communication path as shown in FIG. 15 by increasing traffic on the network.

  At this time, the method of changing the route of the logical communication path 97-1 to 97-2 can be performed by the same method as that of the first embodiment of the ring network change, and will be omitted. Next, a logical ring 93 is newly configured for the ring nodes 501 to 504 in FIG. 7, and a logical communication path 97-3 capable of mutual communication with the logical communication path 97-2 on the logical ring 93. As a result, it is possible to change the logical ring without having to stop the traffic flowing on the logical communication path.

  Specifically, for example, when the ring nodes 501 to 504 have the function of the ring node 301 illustrated in FIG. 5, the logical ring 93 is connected to the ring ports 5012 to 5041 by the logical ring setting management unit 303 in the ring nodes 501 to 504. The logical communication path 97-3 is configured on the ring ports 5012 to 5041 by the logical communication path setting management unit (port) 304, and the logical communication path 97-3 is configured by the ring-communication path correspondence setting unit 305. Is associated with the logical ring 93 so that the conduction or stop state of the logical communication path 97-3 in each ring port is controlled according to the state of the logical ring 93.

  When the ring nodes 501 to 504 have the function of the ring node 401 shown in FIG. 6, the logical ring 93 is configured on the ring ports 5012 to 5041 by the logical ring setting management unit 403, and the logical communication path setting management unit (ring ) 404, the logical communication path 97-3 is configured on the logical ring 93, so that the state of the logical ring 93 can be set to control the conduction or stop state of the logical communication path 97-3 in each ring port. it can.

  As a result, the shape of the logical ring is changed without communication interruption. For example, even when multiple failures occur on the logical ring 91, the ring is reconfigured via a detour route installed in the ring, and communication is performed. It is possible to recover.

(Supplement)
In the above ring network change examples (1 to 4), communication is performed reliably by setting the state of the logical ring so that communication is performed only with the ring port and communication path having the same path before and after the change. It is possible not to generate a disconnection.

  For example, in the case of the ring network change example 1, the communication state is such that communication on the logical ring passes only through the ring ports 5011, 5042, 5051, 5052, 5061, 5062 in the ring nodes 501, 504, 505, 506. To control.

  Specifically, in the logical ring 61 before the change, it can be realized by setting a logical block to the ring ports 5012 and 5041 so that communication is not performed to the ring nodes 502 and 503. For example, when the ring protection technique disclosed in Non-Patent Document 1 is used, this is equivalent to setting Forced Switch to the ring ports 5012 and 5041.

  The same applies to the ring network change examples (2 to 4).

The following describes the ring node, ring network, and ring network changing method of the present embodiment.
(1)
A ring node constituting a ring network,
Multiple ring ports to configure the ring network;
A logical ring setting manager configured to configure a plurality of logical rings on the ring port;
A logical channel setting manager (port) that configures a plurality of logical channels on the ring port;
A ring-communication path correspondence setting unit that associates a logical ring with a logical communication path, and conducts and stops communication via the logical communication path on the ring port according to the control state of the logical ring;
A ring node comprising: a ring-communication path correspondence setting change unit that changes association between a logical ring and a logical communication path.

(2)
A ring node constituting a ring network,
Multiple ring ports to configure the ring network;
A logical ring setting manager configured to configure a plurality of logical rings on the ring port;
A logical channel setting manager (ring) that configures a plurality of logical channels on the logical ring;
A ring node comprising: a ring port-logical ring correspondence setting change unit that changes a ring port in which a logical ring is set to another ring port.

(3)
A ring network composed of a plurality of ring nodes,
Multiple ring ports to configure the ring network;
A logical ring setting manager configured to configure a plurality of logical rings on the ring port;
A logical channel setting manager (port) that configures a plurality of logical channels on the ring port;
A ring-communication path correspondence setting unit that associates a logical ring with a logical communication path, and conducts and stops communication via the logical communication path on the ring port according to the control state of the logical ring;
A ring network comprising a ring node including a ring-communication path correspondence setting change unit that changes association between a logical ring and a logical communication path.

(4)
A ring network composed of a plurality of ring nodes,
Multiple ring ports to configure the ring network;
A logical ring setting manager configured to configure a plurality of logical rings on the ring port;
A logical channel setting manager (ring) that configures a plurality of logical channels on the logical ring;
A ring network comprising a ring node including a ring port-logical ring correspondence setting change unit that changes a ring port in which a logical ring is set to another ring port.

(5)
A ring network changing method for changing the shape of a ring network composed of a plurality of ring nodes,
Multiple ring ports to configure the ring network;
A logical ring setting manager configured to configure a plurality of logical rings on the ring port;
A logical channel setting manager (port) that configures a plurality of logical channels on the ring port;
A ring-communication path correspondence setting unit that associates a logical ring with a logical communication path, and conducts and stops communication via the logical communication path on the ring port according to the control state of the logical ring;
A ring network composed of ring nodes including a ring-communication path correspondence setting change unit that changes the association between a logical ring and a logical communication path,
By changing the settings of the logical ring setting management unit, the logical channel setting management unit (port), and the ring-channel correspondence setting unit,
A ring network changing method, wherein the shape is changed.

(6)
A ring network changing method for changing the shape of a ring network composed of a plurality of ring nodes,
Multiple ring ports to configure the ring network;
A logical ring setting manager configured to configure a plurality of logical rings on the ring port;
A logical channel setting manager (ring) that configures a plurality of logical channels on the logical ring;
A ring network configured by ring nodes including a ring port-logical ring correspondence setting change unit that changes a ring port in which a logical ring is set to another ring port,
By changing the settings of the logical ring setting management unit, the logical channel setting management unit (port), and the ring-channel correspondence setting unit,
A ring network changing method, wherein the shape is changed.

1, 2: Logical rings 11-1, 11-2: Logical communication paths 21, 22, 23: Communication paths 101-106: Ring nodes 1011, 1012, 1021, 1022, 1031, 1032, 1041, 1042, 1051, 1052 , 1061, 1062, 1113, 1143: Ring port 301: Ring nodes 302, 302-1, 302-2,..., 302-n: Ring port 303: Logical ring setting management unit 304: Logical communication path setting management unit (port)
305: Ring-communication path correspondence setting unit 306: Ring-communication path correspondence setting change unit 401: Ring nodes 402, 402-1, 402-2, ..., 402-n: Ring port 403: Logical ring setting management unit 404: Logical channel setting management unit (ring)
405: Ring port-logical ring correspondence setting change unit 501 to 506: Ring nodes 5011, 5012, 5021, 5022, 5031, 5032, 5041, 5042, 5051, 5052, 5061, 5062, 5113, 5123, 5143, 5153: Ring Ports 61, 62: Logical rings 67-1, 67-2: Logical communication paths 71, 72, 73: Logical rings 77-1, 77-2, 78-1, 78-2: Logical communication paths 81, 82, 83 84: Logical rings 87-1, 87-2, 88-1, 88-2: Logical communication paths 91, 92, 93: Logical rings 97-1, 97-2, 97-3: Logical communication paths

Claims (5)

In the relay network constructed by a plurality of ring nodes and a communication path connecting the ring nodes, a logical ring is formed by forming a logical ring with the ring node and the communication path and enabling communication with the logical ring. A ring network changing method to which a ring protocol is applied,
When changing the logical ring, the path that should avoid communication interruption before and after the change is made common, and the logical ring is changed while maintaining the logical communication path on the path,
A ring network changing method, wherein all the logical communication paths are set in the changed logical ring. In the relay network constructed by a plurality of ring nodes and a communication path connecting the ring nodes, a logical ring is formed by forming a logical ring with the ring node and the communication path and enabling communication with the logical ring. A ring network to which the ring protocol is applied,
When changing the logical ring, the path that should avoid communication interruption before and after the change is made common, and the logical ring is changed while maintaining the logical communication path on the path,
A ring network comprising: a control device that sets all the logical communication paths in the logical ring after the change. A ring node that forms a ring network that applies a ring protocol that forms a logical ring in a relay network and sets a logical communication path that enables communication on the logical ring,
When changing the logical ring, the path that should avoid communication interruption before and after the change is made common, and the logical ring is changed while maintaining the logical communication path on the path,
A ring node having a logical ring changing function for setting all the logical communication paths in the changed logical ring. The logical ring changing function is:
A plurality of ring ports for configuring the ring network;
A logical ring setting management unit that forms a plurality of the logical rings on the ring port;
A logical channel setting manager configured to set a plurality of the logical channels on the ring port;
A ring-communication path correspondence setting unit that associates the logical ring with the logical communication path, and conducts and stops communication via the logical communication path on the ring port according to a control state of the logical ring;
A ring-communication path correspondence setting change unit that changes the association between the logical ring and the logical communication path;
The ring node according to claim 3, comprising: The logical ring changing function is:
A plurality of ring ports for configuring the ring network;
A logical ring setting management unit that forms a plurality of the logical rings on the ring port;
A logical channel setting manager configured to set a plurality of the logical channels on the logical ring;
A ring port-logical ring correspondence setting changing unit that changes the ring port in which the logical ring is set to another ring port;
The ring node according to claim 3, comprising:

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